This Lightweight Hiking Daypack Is Made Of Water-Resistant Material And Zipper.Effectively Prevent Rainwater From Wetting The Phone Or Cash And Other Items In The Backpack.Tear-Resistant 210D Nylon Will Effectively Prevent Branches, Stones From Scratching The Pack, Keys And Other Products Can Also Be Safely Placed Inside. All Stitches Are Strengthened To Suit Long-Term Use.